diff --git a/.basedpyright/baseline.json b/.basedpyright/baseline.json
index bc73d2bb..b27e0901 100644
--- a/.basedpyright/baseline.json
+++ b/.basedpyright/baseline.json
@@ -7135,14 +7135,6 @@
                     "lineCount": 1
                 }
             },
-            {
-                "code": "reportUnknownMemberType",
-                "range": {
-                    "startColumn": 14,
-                    "endColumn": 35,
-                    "lineCount": 1
-                }
-            },
             {
                 "code": "reportUnknownMemberType",
                 "range": {
@@ -7335,14 +7327,6 @@
                     "lineCount": 1
                 }
             },
-            {
-                "code": "reportUnknownMemberType",
-                "range": {
-                    "startColumn": 14,
-                    "endColumn": 35,
-                    "lineCount": 1
-                }
-            },
             {
                 "code": "reportUnknownMemberType",
                 "range": {
@@ -8115,14 +8099,6 @@
                     "lineCount": 1
                 }
             },
-            {
-                "code": "reportUnknownMemberType",
-                "range": {
-                    "startColumn": 14,
-                    "endColumn": 35,
-                    "lineCount": 1
-                }
-            },
             {
                 "code": "reportUnknownMemberType",
                 "range": {
@@ -8688,50 +8664,18 @@
                 }
             },
             {
-                "code": "reportUnknownParameterType",
-                "range": {
-                    "startColumn": 29,
-                    "endColumn": 34,
-                    "lineCount": 1
-                }
-            },
-            {
-                "code": "reportMissingParameterType",
-                "range": {
-                    "startColumn": 29,
-                    "endColumn": 34,
-                    "lineCount": 1
-                }
-            },
-            {
-                "code": "reportUnknownParameterType",
-                "range": {
-                    "startColumn": 36,
-                    "endColumn": 41,
-                    "lineCount": 1
-                }
-            },
-            {
-                "code": "reportMissingParameterType",
-                "range": {
-                    "startColumn": 36,
-                    "endColumn": 41,
-                    "lineCount": 1
-                }
-            },
-            {
-                "code": "reportUnknownParameterType",
+                "code": "reportAny",
                 "range": {
-                    "startColumn": 43,
-                    "endColumn": 50,
+                    "startColumn": 12,
+                    "endColumn": 15,
                     "lineCount": 1
                 }
             },
             {
-                "code": "reportMissingParameterType",
+                "code": "reportAny",
                 "range": {
-                    "startColumn": 43,
-                    "endColumn": 50,
+                    "startColumn": 19,
+                    "endColumn": 86,
                     "lineCount": 1
                 }
             },
@@ -8739,31 +8683,7 @@
                 "code": "reportAny",
                 "range": {
                     "startColumn": 15,
-                    "endColumn": 82,
-                    "lineCount": 1
-                }
-            },
-            {
-                "code": "reportUnknownArgumentType",
-                "range": {
-                    "startColumn": 52,
-                    "endColumn": 57,
-                    "lineCount": 1
-                }
-            },
-            {
-                "code": "reportUnknownArgumentType",
-                "range": {
-                    "startColumn": 59,
-                    "endColumn": 64,
-                    "lineCount": 1
-                }
-            },
-            {
-                "code": "reportUnknownArgumentType",
-                "range": {
-                    "startColumn": 74,
-                    "endColumn": 81,
+                    "endColumn": 20,
                     "lineCount": 1
                 }
             },
@@ -9967,14 +9887,6 @@
                     "lineCount": 1
                 }
             },
-            {
-                "code": "reportUnknownMemberType",
-                "range": {
-                    "startColumn": 14,
-                    "endColumn": 44,
-                    "lineCount": 1
-                }
-            },
             {
                 "code": "reportUnknownMemberType",
                 "range": {
@@ -14621,14 +14533,6 @@
                     "lineCount": 1
                 }
             },
-            {
-                "code": "reportUnknownMemberType",
-                "range": {
-                    "startColumn": 18,
-                    "endColumn": 39,
-                    "lineCount": 1
-                }
-            },
             {
                 "code": "reportUnknownArgumentType",
                 "range": {
@@ -14637,14 +14541,6 @@
                     "lineCount": 1
                 }
             },
-            {
-                "code": "reportUnknownMemberType",
-                "range": {
-                    "startColumn": 18,
-                    "endColumn": 39,
-                    "lineCount": 1
-                }
-            },
             {
                 "code": "reportUnknownArgumentType",
                 "range": {
diff --git a/pyproject.toml b/pyproject.toml
index f3cd75e6..a0a255c4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -92,15 +92,16 @@ extend-select = [
     "Q",   # flake8-quotes
     "RUF", # ruff
     "SIM", # flake8-simplify
+    "TC",  # flake8-type-checking
     "UP",  # pyupgrade
     "W",   # pycodestyle
-    "TC",
 ]
 extend-ignore = [
-    "C90",  # McCabe complexity
-    "E221", # multiple spaces before operator
-    "E226", # missing whitespace around arithmetic operator
-    "E402", # module-level import not at top of file
+    "C90",      # McCabe complexity
+    "E221",     # multiple spaces before operator
+    "E226",     # missing whitespace around arithmetic operator
+    "E402",     # module-level import not at top of file
+    "RUF067",   # non-empty-init-module
 ]
 
 [tool.ruff.lint.flake8-quotes]
diff --git a/sumpy/fmm.py b/sumpy/fmm.py
index 3d5681fd..3599995a 100644
--- a/sumpy/fmm.py
+++ b/sumpy/fmm.py
@@ -46,7 +46,7 @@
 from boxtree.tree import Tree
 
 import pytools.obj_array as obj_array
-from pytools import memoize_method
+from pytools import memoize_in, memoize_method
 
 from sumpy import (
     E2EFromChildren,
@@ -240,9 +240,17 @@ def p2p(self):
                           exclude_self=self.exclude_self,
                           strength_usage=self.strength_usage, name="p2p")
 
-    @memoize_method
-    def opencl_fft_app(self, shape, dtype, inverse):
-        return get_opencl_fft_app(self._setup_actx, shape, dtype, inverse=inverse)
+    def opencl_fft_app(self,
+                       shape: tuple[int, ...],
+                       dtype: np.dtype[Any],
+                       inverse: bool) -> Any:
+        @memoize_in(self._setup_actx, (
+            SumpyTreeIndependentDataForWrangler.opencl_fft_app,
+            shape, dtype, inverse))
+        def app() -> Any:
+            return get_opencl_fft_app(self._setup_actx, shape, dtype, inverse=inverse)
+
+        return app()
 
 # }}}